228 
a wide and open prairie. For several years the crows were there in 
large numbers, but some three years ago boys shot into the roost and 
drove them away. They have returned. Mrs. George Schmall estimates 
the number roosting there at one thousand. 
This grove is a ‘wind breaker,’ the trees, Scotch and Austrian pine, 
were set out very thick many years ago. It makes a grand shelter in the 
winter time. Many of these crows from this pine grove go in a south- 
easterly direction to-find food in the Kankakee marsh region. 
The second crow roost of the county is nine miles northwest of Crown 
Point on both sides of the ‘‘Panhandle’”’ railroad, in groves of small oak 
trees, and one evergreen grove. I visited this locality Tuesday, December 
27, 1898. About one mile from it I saw, at 2 p. m., two or three hundred 
crows feeding in a corn field. Reaching the farm house I learned that 
two or three pairs of crows selected these groves in 1875. The number 
of individuals in this colony now may be placed at two thousand. Many 
of them pass into Illinois to get food, passing in a southwesterly direction 
over Dyer, on the State line, mornings, sometimes two hundred in a flock. 
THe DistrrBpuTiIoN OF BLoop SINUSES IN THE REPTILIAN HEAD. 
3y H. L. Bruner. 
| Abstract.| 
The principal blood sinuses of the reptilian head are the following: 
1. The intra-cranial sinuses, which were first described by Rathke’ 
in 1839. 
2. The nasal sinus, which surrounds the external naris and the nasal 
vestibule; it was observed and described by Leydig? in 1872. 
3. The orbital sinus, which lies between the eyeball and its orbit. This 
sinus was first investigated by Weber® in 1877. 
The development of the above-mentioned sinuses has been worked out 
by Grosser and Brezina‘ in the snake (Tropidonotus natrix). 
‘Rathke: ‘ Entwicklun sgeschichte der Natter (Coluber natrix).’’ Koenigsberg, 1839. 
* Leydig: ‘‘ Die in Deutschland lebenden Arten der Saurier.’’ Tiibingen. 1872. 
*Weber: “ Nebenorgane des Auges der Reptilien.’’ Archiv fiir Naturgeschichte, 43 
Jahrg., Band I. 
‘ Grosser und Brezina: Morphologisches Jahrbuch., Band 23, 1895. - 
